[FIXED] Stair rails disappear w/wall placement partially covering from the top

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.99.264.1030
What expansions, game packs, and stuff packs do you have installed? All released DLC
Steps: How can we find the bug ourselves? Build a staircase with a railing and apply a wall to one or both sides that starts at the top and terminates prior to the bottom.
What happens when the bug occurs? The railing except for the newel post at the bottom disappears.
What do you expect to see? The railing from the point of termination of the wall to the bottom of the stairs.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

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To start, I discovered this in a brand-new save file that I prepared for patch 1.99.264.1030 by removing my original Sims4 folder from Documents > Electric Arts and then starting the game to the welcome screen, closing the game and generating a fresh Sims 4 folder. This is the only save currently in that folder as I have not replaced my mod folder, or save folder, only my tray folder. I noticed the glitch in a house from my library that I placed on the 64X64 lot in the new Chestnut Ridge world in the Riders' Glen neighborhood of EP 14. So to ensure that this isn't an occurrence particular to that world or lot I made a blank box in Newcrest to further experiment and had the same results.

• A staircase placed against a wall on one side with the other side open the railing disappeared on the wall side but remained intact on the opposite side as expected.     

• A staircase placed in the center of a room with no wall on the other side both railings appeared as expected. 
• A staircase placed with a wall on side that follows the entire run of the staircase from top to bottom but with a wall on the opposite side that only follows part of the run from the top terminating prior to the bottom causes the railing to entirely disappear except for the newel post at the bottom of the staircase.

• But the railing will reappear if the bottom of the staircase is turned at a 90-degree angle and also if it's turned further so that it sits flush with the wall on one side.

I can't say for sure if the railing glitch started with the most recent patch 1.99.264.1030 or if it started with the patch for EP 13 as I think it was stated in the livestream for that patch 1.96.365.1030 that the issue of stair rails clipping through walls was addressed then. I just happened to notice it with this EP and its preceding patch update. 

Edit By Crinrict: Fixed Duplicate Template